Run ansible apply test in parallel

Change-Id: Ic5b5ef5ca115ca244ebf86079f9b192fbb13fad6

tools/apply-test.sh

@@ -63,7 +63,6 @@ sudo mkdir -p /var/run/puppet
 sudo -E bash -x ./install_modules.sh
 echo "Running apply test on these hosts:"
 find applytest -name 'puppetapplytest*.final' -print0
-# TODO: restore the use of "-P $(nproc)" for parallel testing
 find applytest -name 'puppetapplytest*.final' -print0 | \
-    xargs -0 -n 1 -I filearg \
+    xargs -0 -P $(nproc) -n 1 -I filearg \
         ./tools/test_puppet_apply.sh filearg

tools/prep-apply.sh

@@ -72,6 +72,7 @@ sudo mv /tmp/hosts /etc/hosts
 # of configuring hiera.
 sudo mkdir -p /opt/system-config
 sudo ln -sf $(pwd) /opt/system-config/production
+sudo -H mkdir -p ~/.ansible/tmp
 
 virtualenv --system-site-packages /tmp/apply-ansible-env
 /tmp/apply-ansible-env/bin/pip install ansible

tools/test_puppet_apply.sh

@@ -15,12 +15,20 @@
 # under the License.
 
 file=$1
-fileout=${file}.out
+fileout=`pwd`/${file}.out
+ansible_root=`mktemp -d`
+cat > $ansible_root/ansible.cfg <<EOF
+[defaults]
+local_tmp=$ansible_root/local_tmp
+remote_tmp=$ansible_root/remote_tmp
+EOF
 echo "##" > $fileout
 cat $file > $fileout
-sudo /tmp/apply-ansible-env/bin/ansible-playbook -f1 --limit localhost playbooks/remote_puppet_adhoc.yaml -e puppet_environment=production -e manifest=`pwd`/$file -e puppet_noop=true -e puppet_logdest=`pwd`/$fileout
+export ANSIBLE_CONFIG=$ansible_root/ansible.cfg
+sudo -H -E /tmp/apply-ansible-env/bin/ansible-playbook -f1 --limit localhost playbooks/remote_puppet_adhoc.yaml -e puppet_environment=production -e manifest=`pwd`/$file -e puppet_noop=true -e puppet_logdest=$fileout
 ret=$?
 if [ $ret -ne 0 ]; then
     mv $fileout $fileout.FAILED
 fi
+rm -fr $ansible_root
 exit $ret